Chemical Engineering Thermodynamics
Which of the following is an undesirable characteristics of a refrigerant ?

Its vapor pressure at the condenser temperature should be very high
It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils
None of these
It should be non-explosive

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Chemical Engineering Thermodynamics
The necessary condition for phase equilibrium in a multiphase system of N components is that the

Chemical potentials of all components should be same in a particular phase
Sum of the chemical potentials of any given component in all the phases should be the same
Chemical potentials of a given component should be equal in all phases
None of these

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